Maybe it's a book from your childhood, like the James Herriot series (starting with "All Creatures Great and Small") written by the British country vet.
Or perhaps it's a book about behavior like Patricia McConnell's "The Other End of the Leash."
Or Paul Gallico's "The Silent Miaow: A Manual for Kittens, Strays, and Homeless Cats" described as a "delightful manual which instructs stray kittens and homeless cats in how to obtain, captivate, and dominate the families of their choice."
There's also the wide variety of creatures ("The Good Good Pig: The Extraordinary Life of Christopher Hogwood" is one of them), written about with warmth and wisdom by Sy Montgomery, who has taken part in the Tucson Festival of Books.

